In my tests the massive package of maps does not work with gps 2012 with new firmware (25x5, 24x5, 34xx, 35xx), only with previous models. The maps are identified but it is not possible to select them individually. With all maps selected at the same time there are conflicts of their databases. This particular feature is not of this massive package. I already tried with other maps and the result is the same. It's probably due to some configuration or compatibility of gmaptool. For these recent gps models and in general it is much better download the maps individually and copy them to the folder Map of the internal or SD memory card. Massive packs maps are useful only for older models where all maps have to be grouped under the name gmapsupp.img (or gmapprom.img) as the 7xx, 2xx and olders outdoor handhelds..